Electric vacuum valve

Details Electric vacuum valve Electric vacuum valve

F - Mech Eng,Light,Heat,Weapons

16

K

251/14

F16K 31/02 (2006.01) F16K 17/38 (2006.01)

Patent

CA 1091635

ELECTRIC VACUUM VALVE Abstract of the Disclosure An electric vacuum valve comprising a body including a chamber having a first passage adapted to be connected to a source of vacuum, a valve seat in the chamber, a bi-metallic disc associated with the valve seat and operable to close the first passage and a second passage to the exterior of said body. A PTC disc is positioned in the chamber adjacent the bi-metallic disc and includes a first terminal connected to one side thereof and extending exteriorly of the body and a second terminal connected to the other side thereof and extending externally of the body such that heat from the PTC disc functions to radiate toward the bi-metallic disc when power is applied to said terminals to cause the bi-metallic disc to seat against the valve seat and when power is terminated, the bi-metallic disc cools and moves away from the valve seat.

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